Stabilizer for aeroplanes.



J. T. PARKER.

STABILIZER FOR AEROPLANES.

APPLICATION FILED JAN. 15. 1915.

1,149,680. 7 Patented Aug. 10, 1915.

witnesses sustaining planes in normal position with my device locatedbetween them. Fig. 2 1s views.

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PATENT Fries.

srABILIzER FOR AEROPLANES.

Specification of Letters Patent. m t A 0, 19.15,

Application filed anuary 15, 1915. Serial N 0. 2,427.

To all whom it-may concern:

Be it known that I, Josnrn THOMPSON PARKER, a citizen of the UnitedStates, r'esiding at \Vashington, District of Columbia, have inventedcertain'new and useful Improvements in Stabilizers for Aeroplanes, ofwhich the following is a specification.

My invention relates to stabilizers for aeroplanes. 4

The object of the invention is tUPIOVldB means whereby the stability ofaeroplanes may be automatically maintained by the start of thesustaining planes to assume an angle by the wind and by said means themachine will maintain a horizontal position at all times. Furtherobjects and advantages will be more fully described herein andspecifically pointed out in the annexed claims recourse being had to theaccompanying drawing forming a part of this specification in which:

Figure 1 is a front perspective view of the a side view, and Fig. 3 is afragmentary front view of a portion of the lower sustaining plane and isan-enlargement of that shown in Fig. 1.

In the drawing, like reference numerals indicate similar parts in allthe several 1 represents the upper and 2' the lower sustaining planes ofan aeroplane arranged one above the other, as shown.

3 are the supports or connectors for the planes, and his thelower framework or landing portion of the apparatus.

5 and 6 are the two rockable planes or stabilizers placed about midwaybetween the planes 1 and 2 and at the ends thereof leav-' ing anunoccupied space in the center, as shown in Flg. 1. The planes 5 and 6are provided with short axles 7, at their trans- 'verse centers whichare mounted in the standardsor supports 8 and are, consequently, a aptedfor oscillation therebetween.

9 is acounterpoise, center or pendulum to rock thereon and toassume anangle according to the inclination or careen thereof under the influenceof the wind. The lower planefor its frame work is rockably secured tothe part 9 by means of the hinge joint 11 and'its pin 12, Fig. 3. v N

The stabilizing planes 5 and Gare automatically made to assume anglesfor maintaining stability by the center remaining perpendicular, whilethe sustaining planes. depart-from the horizontal, thus pullingandslacking ropes or wires which will now be described.

Assuming that Fig. l is a front view, a wire or cable 13 extends fromthe right hand front corner of the controller, center or pendulum 9,through a pulley, thence vertically to the front edge of the lefthandstabilizing plane 6. On the opposite-side, the wire 14 operates theplane 5 at its front edge in the same manner as the wire or cable 13.

15 is a wire or cable from the rear right hand cornerof the pendulum 9,to a pulley, thence horizontally along the rear of the lower plane 2,thence again vertically to the rear edge of the stabilizing plane 5.

The wire 16 is similar but reverses to the the same point as the wire13, goes to a pulley,'and thence vertically to the'upper front edge ofthe top sustaining plane 1, thence along said edge then vertically tothe front of the stabilizer .5 near the end of the wire14.

The wire 18 starts from the left hand front side of the pendulum orcenter 9 thence to the lower front edge of the plane 2, thencevertically and then horizontally along the front edge of plane 1 andthen drops straight downward to near the front center portion of thestabilizing plane 6.

As will be. seen, when a wire pulls to tighten, the opposite wireslackens. When the right hand side of the biplane is depressed then thewires will act and cause the plane 6 to rise which will cause the windto maintain the equipoise or balance of the machine.

It will be observed that 'the pendulum is elongated in a fore and aftdirection, whereby the rear cables may be carried directly up to therear ends of the stabilizing planes and the front cables may be carrieddirectly up to the front edges of the stabilizing planes, therebyavoiding the necessity of I pulling the cables diagonally of themachine. By thus arranging the cables, a direct pull on the stabilizingplanes is provided for,

thereby insuring promptness of action of the stabilizing planes and alsothe highest degree of stability. It will also be seen that I connect tothe rear edge of the stabilizing planes at least one cable for pullingas well as holding down the rear edges of the planes and that I connectto the front edge of each stabilizing plane two cables for pulling andholding them' inopposition to each other. This arrangement of cables isadvantageous in that it provides ample cable strength for holding thestabilizing planes when under great strain.

I claim The combination with an aeroplane, of a pendulum elongated in afore and aft direction, a pair of stabilizing planes pivoted at pointsbetween their front and rear edges, a cable connecting the rear edge ofeach plane .wardly to the pendulum and the other cable extendingupwardly from the plane, and thence around to the opposite side of thependulum, suitable pulleys being provided for all of said cables.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses.

JOSEPH THOMPSON PARKER.

Witnesses:

\VALTER B. BURRow, L. E. DODGE.

